Two-cycle internal combustion engine



May 2, 1933. R. HANSEN 1,907,354

TWO-CYCLE INTERNAL COMBUSTION ENGINE Filed Dec. 20, 1950 2 Sheets-Sheetl INVENTOR 1 I l N WITNBS: ATTORNEY May 2, 1933. R, N 1,907,354

TWO-CYCLE INTERNAL COMBUSTION ENGINE Filed Dec. 20, 1930 2 Sheets-Sheet2 ATTORNEY Patented May 2, 1933 UNITED STATES PAT HANSEN, OF \VHITECETY, FLGRIDA, AS$IGNOR OF TXVELVE PER CENT TO A. R. KERR, TWELVE ZEE TSD. A. PFJ-iRR, TXUELVE PER CENT T0 D. F.

MACDDNALD AND TWELVE PER GEE? FLORIDA TVO-CYCLE II ITEENAL O. 9. SUMMER,ALL OF VEROBELACH,

COMBUSTION ENGINE Application filed December 20, 1930. Serial No.508,824.

This invention relates to a two-cycle internal combustion engine, thegeneral object of the invention being to greatly reduce the number ofmoving parts, tosecure the maximum power with the minimum amount of fueland to otherwise increase the efficiency of the engine, by providingmeans for compressing the charge in one cylinder and introducing it intoanother cylinder, where it is fired.

This invention also consists in certain other features of constructionand in the combination and arrangement of the several parts, to behereinafter fully described, illustrated in the accompanying drawingsand specifically pointed out in the appended claim.

In describing the invention in detail, reference will be had to theaccompanying drawings wherein like characters denote like orcorresponding parts throughout the several views, and in which Figure 1is a longitudinal sectional view, with parts in elevation and partsbroken away.

Figure 2 is a transverse sectional view.

Figure 3 is a view of the member 8.

Figure 4 is a view showing the chambers 13.

In these views, the numeral 1 indicates the cylinder block whichcontains the cylinders 2. each cylinder being of two diameters, with thelarger lower diameter forming a compression chamber 3. A piston 4 isprovided for each cylinder and the lower end of each piston is shaped toprovide a compression cylinder 5 for the compression chamber 3. Adepending part of each cylinder 2 forms a skirt 6 which projects intothe combustion chamber and an apron 7 is formed in each compressioncylinder 5. A member 8 is inserted in a recess in one side of the blockand is held therein by a. cover plate 9 which is bolted or otherwisefastened to the block, as shown at 10. Partitions 11. 12 and 12 formwith the member 8 and portions of the cylinders 2 chambers 13, each ofwhich has a port l i connecting the lower part of the chamber with theinterior of a cylinder, and partitions 15 form chambers 16 in the member8. One of these chambers 16 is connected by a port 17 with a compressionchamber 3 and a port 18 connects one of these chambers 16 with thechamber 13. An inlet manifold 19 is connected by a port'20 with eachcompression chamber 3 and an exhaust manifold 21 From the foregoing itwill be seen that when a piston is in its lowest position, the inletport 2'0 will be uncovered so that the explosive mixture from themanifold can enter the compression chamber 3 and then as the pistonmoves upwardly, the compression piston 5 will first cover the inlet portand then the apron 7 will cover the port so that the port remains closedduring the upward stroke of the piston. The mixture compressed in thechamber 3 will pass through the port 17 into chamber 16 and from saidchamber 16, the compressed mixture will pass into the combustion spaceof the next cylinder as soon as the port 14 of said next cylinder isuncovered by the downwardly moving piston therein. The mixturecompressed in the second cylinder will flow into the chamber 16 from theport 17 of said-second cylinder and then pass through the port 18 intothe chamber 13 and through the port 14 into the first cylinder when thepiston of said first cylinder uncovers the port 14:. The flow of thecompressed gases into each cylinder will cause the exhaust gases to flow901;

through the port 22 into the exhaust manifold 21 and the scavengingeffect is increased by forming the top of each piston with a baffle 26.Thus I have eliminated the usual valves and their operating parts, asthe pistors and the aprons 7 control the ports. lhe mixture beingcompressed and heated in one cyllnder before being introduced into thecombustion space of the next cylinder where it is still furthercompressed, causes the en- Each pair of cranks is gine to operate Withthe maximum efficiency with the minimum amount of fuel.

The usual ignition system including the spark plugs 27, may be used,though if the 5 mixture is compressed to an extent where combustion willbe automatically produced, the ignition system may be eliminated.

It is further understood that injectors may be used in place of sparkplugs 27, and that 19 the air manifold 19 may be designed for Dieseltype of operation.

It is thought from the foregoing description that the advantages andnovel features of the invention will be readily apparent.

It is to be understood that changes may be made iii-the construction andin. the combination and arrangement of the several parts, provided thatsuch changes fall within the scope of the appended claim.

03 lVhat I claim is An internal combustion engine comprising a cylinderblock containing cylinders, each cylinder being of two diameters, thelarger diameter being lowermost and forming a 3compression chamber. apiston provided in each cylinder and having its lower end shaped to forma compression cylinder for the compression chamber, a depending portionon each cylinder forming a skirt projected into 3Q 'the compressionchamber, an apron formed in each compression cylinder, a member insertedin one side of the block, partitions formed with the member and portionsof the cylinder to provide chambers. each of said sbjjlast namedchambers having a port connecting the lower portion thereof with theinterior of the cylinder, partitions constitut ing chambers in themember and one of the last named chambers having a port con1-mimunicating with the compression chamber and another port connectinganother of said chambers with the chamber formed by the first namedpartition, an inlet manifold communicative with each compressionchamber.

an exhaust manifold communicative with the lower portion of eachcylinder, and a cover plate removably mounting the member in the block.

In testimony whereof I aflix my signature.

REGNER HANSEN.

